The Collaborative International Dictionary of English v.0.48:

Mallophaga \Mal*loph"a*ga\ (m[a^]l*l[o^]f"[.a]*g[.a]), n. pl.
   [NL., fr. Gr. mallo`s a lock of wool + fagei^n to eat.]
   (Zool.)
   An extensive group of insects which are parasitic on birds
   and mammals, and feed on the feathers and hair; -- called
   also bird lice. See Bird louse, under Bird.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Mallophaga
    n 1: biting lice [syn: Mallophaga, order Mallophaga]